diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index e7f1b182fc15..87b95c9410b4 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -19,6 +19,7 @@ #include <traceevent/event-parse.h> #include <api/fs/tracing_path.h> #include "builtin.h" +#include "util/cgroup.h" #include "util/color.h" #include "util/debug.h" #include "util/env.h" @@ -83,6 +84,7 @@ struct trace { struct perf_evlist *evlist; struct machine *host; struct thread *current; + struct cgroup *cgroup; u64 base_time; FILE *output; unsigned long nr_events; @@ -2370,6 +2372,34 @@ static int trace__run(struct trace *trace, int argc, const char **argv) trace__sched_stat_runtime)) goto out_error_sched_stat_runtime; + /* + * If a global cgroup was set, apply it to all the events without an + * explicit cgroup. I.e.: + * + * trace -G A -e sched:*switch + * + * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc + * _and_ sched:sched_switch to the 'A' cgroup, while: + * + * trace -e sched:*switch -G A + * + * will only set the sched:sched_switch event to the 'A' cgroup, all the + * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" + * a cgroup (on the root cgroup, sys wide, etc). + * + * Multiple cgroups: + * + * trace -G A -e sched:*switch -G B + * + * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes + * to the 'B' cgroup. + * + * evlist__set_default_cgroup() grabs a reference of the passed cgroup + * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. + */ + if (trace->cgroup) + evlist__set_default_cgroup(trace->evlist, trace->cgroup); + err = perf_evlist__create_maps(evlist, &trace->opts.target); if (err < 0) { fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); @@ -2472,8 +2502,13 @@ again: for (i = 0; i < evlist->nr_mmaps; i++) { union perf_event *event; + struct perf_mmap *md; + + md = &evlist->mmap[i]; + if (perf_mmap__read_init(md) < 0) + continue; - while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) { + while ((event = perf_mmap__read_event(md)) != NULL) { struct perf_sample sample; ++trace->nr_events; @@ -2486,7 +2521,7 @@ again: trace__handle_event(trace, event, &sample); next_event: - perf_evlist__mmap_consume(evlist, i); + perf_mmap__consume(md); if (interrupted) goto out_disable; @@ -2496,6 +2531,7 @@ next_event: draining = true; } } + perf_mmap__read_done(md); } if (trace->nr_events == before) { @@ -2533,6 +2569,7 @@ out_delete_evlist: trace__symbols__exit(trace); perf_evlist__delete(evlist); + cgroup__put(trace->cgroup); trace->evlist = NULL; trace->live = false; return err; @@ -2972,6 +3009,18 @@ out: return err; } +static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) +{ + struct trace *trace = opt->value; + + if (!list_empty(&trace->evlist->entries)) + return parse_cgroups(opt, str, unset); + + trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); + + return 0; +} + int cmd_trace(int argc, const char **argv) { const char *trace_usage[] = { @@ -3062,6 +3111,8 @@ int cmd_trace(int argc, const char **argv) "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout, "per thread proc mmap processing timeout in ms"), + OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", + trace__parse_cgroups), OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, "ms to wait before starting measurement after program " "start"), @@ -3088,6 +3139,11 @@ int cmd_trace(int argc, const char **argv) argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); + if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { + usage_with_options_msg(trace_usage, trace_options, + "cgroup monitoring only available in system-wide mode"); + } + err = bpf__setup_stdout(trace.evlist); if (err) { bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); |